[UNIXgod]

There's gentoo/alt and fink which predates DarwinPorts. I'm sure there is even a pkgsrc user out there. I've occasionally used this one called make. It's sort of a meta language to homebeer. In fact it comes in two flavors pmake and gmake. =P

[X-Istence]

You forgot bsdmake ... which up until OS X ML was still available on OS X.

[UNIXgod]

I didn't forget it. That is pmake my friend =)